4.7 Article

Photoelectrochemical stability of WO3/Mo-doped BiVO4 heterojunctions on different conductive substrates in acidic and neutral media

Journal

APPLIED SURFACE SCIENCE
Volume 548, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.apsusc.2021.149251

Keywords

Bismuth vanadium oxide; Tungsten trioxide; Photoanode; Water oxidation; Durability; Photostability

Funding

  1. JST PRESTO [JPMJPR18T1]
  2. JSPS KAKENHI [JP20H02525]

Ask authors/readers for more resources

The study indicates that pH plays a significant role in chemical dissolution and photocorrosion, directly influencing the stability of photocurrent generated from the WO3/Mo-doped BiVO4 heterojunction in both substrate structures.
Bismuth vanadate (BiVO4) and tungsten trioxide (WO3) are promising materials for photoelectrochemical (PEC) water splitting. To date, the heterojunction composed of both materials garners great attention due to the superior performance and the potential to capture visible light. However, the compatibility in different experimental conditions is limited by its low stability. Some factors which can impact the stability are pH of aqueous media, electrolytes, conductive substrates, and light irradiation. The mechanism of the corrosion process, which decays PEC performance as a function of time, has been studied. In this article, we prepared WO3/Mo-doped BiVO4 on a three-dimensional macroporous titanium (Ti) felt, which is a potential substrate for different types of PEC, and compare its stability with the heterostructure prepared on a conventional fluorine-doped tin oxide (FTO)-coated glass. The PEC performance and the stability of single layer WO3, Mo-doped BiVO4, and the heterojunction are investigated at low and moderate pH. The characterization and PEC measurements determined that pH has a significant effect on chemical dissolution and photocorrosion, directly impacting the stability of photocurrent generated from WO3/Mo-doped BiVO4 heterojunction in both substrate structures. Besides, WO3/Mo-doped BiVO4 on Ti felt shows higher and more stable PEC performance at low and moderate pH values.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available